Face Selector

local toolbar = plugin:CreateToolbar("Face Selector")
local button = toolbar:CreateButton("Show Selected Face", "Shows selected face of models and baseparts. Can also display directional vectors.", "rbxassetid://5602410390")
local mouse = plugin:GetMouse()

local runService = game:GetService("RunService")
local selection = game:GetService("Selection")
local coreGUI = game:GetService("CoreGui")

if coreGUI:FindFirstChild("Tukars|FaceSelectingGUI") then coreGUI["Tukars|FaceSelectingGUI"]:Destroy() end

local gui = script.Parent["Tukars|FaceSelectingGUI"]:Clone()
gui.Parent = coreGUI
local enabled = false
local tweening = false


local connections = {}

if coreGUI:FindFirstChild("Tukars|Visuals") then coreGUI["Tukars|Visuals"]:Destroy() end
local visuals = script.Parent["Tukars|Visuals"]:Clone()
visuals.Parent = coreGUI
local faces = visuals.Face
local direction = visuals.Direction
local binded = false
local selectedFace = nil
local currentlySelected = nil
local active = true
local showDirectionalVectors = false
local inBounds = false

local gColor = Enum.StudioStyleGuideColor
local gModifier = Enum.StudioStyleGuideModifier

local function getUIColor(guideColor, guideModifier)
    return settings().Studio.Theme:GetColor(gColor[guideColor], gModifier[guideModifier])
end

local function updatePluginTheme()
    gui.Main.BackgroundColor3 = getUIColor("MainBackground", "Default")
    gui.Main.Face.TextColor3 = getUIColor("MainText", "Default")
    for _, ui in pairs(gui.Main.FaceSelector:GetChildren()) do
        if ui ~= gui.Main.FaceSelector.UIListLayout then
            local typ = ui.Name == selectedFace and "Selected" or "Default"
            ui.BackgroundColor3 = getUIColor("RibbonButton", typ)
            ui.TextColor3 = getUIColor("MainText", typ)
            ui.BorderColor3 = getUIColor("Border", "Default")
        end
    end
    for _, ui in pairs(gui.Main.CheckBoxes:GetDescendants()) do
        if ui.Name == "CheckBox" then
            ui.BackgroundColor3 = getUIColor("RibbonButton", "Selected")
        elseif ui.Name == "Display" then
            ui.BackgroundColor3 = getUIColor("Button", "Selected")
        elseif ui:IsA("TextLabel") then
            ui.TextColor3 = getUIColor("MainText", "Default")
        end
    end
end
updatePluginTheme()

local v3 = Vector3.new

local function withinBounds(obj)
    local tx,ty = obj.AbsolutePosition.X, obj.AbsolutePosition.Y
    local bx,by = tx + obj.AbsoluteSize.X, ty + obj.AbsoluteSize.Y
    return (mouse.X >= tx and mouse.X <= bx and mouse.Y >= ty and mouse.Y <= by)
end

local function update()
    for _, ui in pairs(gui.Main.FaceSelector:GetChildren()) do
        if ui ~= gui.Main.FaceSelector.UIListLayout then
            if withinBounds(ui) and ui.Name ~= selectedFace then
                ui.BackgroundColor3 = getUIColor("RibbonButton", "Hover")
                ui.TextColor3 = getUIColor("MainText", "Hover")
            elseif ui.Name ~= selectedFace then
                ui.BackgroundColor3 = getUIColor("RibbonButton", "Default")
                ui.TextColor3 = getUIColor("MainText", "Default")
            end
        end
    end
    if withinBounds(gui.ActivationZone) then
        if not inBounds then
            gui.Main:TweenPosition(UDim2.new(0.5, 0, 0, 6), Enum.EasingDirection.Out, Enum.EasingStyle.Quad, 0.15, true)
            inBounds = true
        end
    else
        if inBounds then
            gui.Main:TweenPosition(UDim2.new(0.5, 0, 0, -175), Enum.EasingDirection.Out, Enum.EasingStyle.Quad, 0.15, true)
            inBounds = false
        end
    end

end

local faceOffsets = {
    Back = v3(0,0,1),
    Bottom = v3(0,-1,0),
    Front = v3(0,0,-1),
    Left = v3(-1,0,0),
    Right = v3(1,0,0),
    Top = v3(0,1,0),
}

local function getObjSize()
    local objCFrame, objSize
    if currentlySelected:IsA("Model") then
        return currentlySelected:GetBoundingBox()
    elseif currentlySelected:IsA("BasePart") then
        return currentlySelected.CFrame, currentlySelected.Size
    end
end

local function updateLookVectorText(upda)
    if upda then
        for _,t in pairs(gui.Main.CheckBoxes.Vectors:GetChildren()) do
            local vector = currentlySelected.CFrame[t.Name]
            for _,d in pairs(t:GetChildren()) do
                if d.Name ~= "Text" then
                    d.Text = string.sub(tostring(vector[d.Name]), 0, 6)
                end
            end
        end
    else
        for _,t in pairs(gui.Main.CheckBoxes.Vectors:GetChildren()) do
            for _,d in pairs(t:GetChildren()) do
                if d.Name ~= "Text" then
                    d.Text = ""
                end
            end
        end
    end
end

local function updateObject()
    local targfaces = {"Top", "Bottom", "Left", "Right"}
    if currentlySelected then
        local objCFrame, objSize = getObjSize()
        if selectedFace then
            local index = 1
            for i,v in pairs(faceOffsets) do
                if v:Cross(faceOffsets[selectedFace]) ~= v3() then
                    local targetAdornee = faces[targfaces[index]]
                    targetAdornee.Adornee = currentlySelected
                    local targOffset = faceOffsets[selectedFace] + v
                    targetAdornee.SizeRelativeOffset = targOffset
                    local targetSize = v:Cross(faceOffsets[selectedFace])
                    local xsize = targetSize.X ~= 0 and objSize.X + 0.15 or 0.15
                    local ysize = targetSize.Y ~= 0 and objSize.Y + 0.15 or 0.15
                    local zsize = targetSize.Z ~= 0 and objSize.Z + 0.15 or 0.15
                    targetAdornee.Size = v3(xsize, ysize, zsize)
                    index = index + 1
                end
            end
        else
            for i,v in pairs(targfaces) do
                local targetAdornee = faces[v]
                targetAdornee.Adornee = nil
            end
        end
        updateLookVectorText(true)
        local targetSize = math.max(objSize.X, objSize.Y, objSize.Z)
        local directions = visuals.Direction
        for i,v in pairs(visuals.Direction:GetChildren()) do
            v.Adornee = currentlySelected
        end
        direction.lookVector.Size = v3(0.1, 0.1, targetSize)
        direction.lookVector.SizeRelativeOffset = v3(0, 0, -targetSize/objSize.Z)
        direction.rightVector.Size = v3(targetSize, 0.1, 0.1)
        direction.rightVector.SizeRelativeOffset = v3(targetSize/objSize.X, 0, 0)
        direction.upVector.Size = v3(0.1, targetSize, 0.1)
        direction.upVector.SizeRelativeOffset = v3(0, targetSize/objSize.Y, 0)
    else
        for i,v in pairs(targfaces) do
            faces[v].Adornee = nil
        end
        for i,v in pairs(visuals.Direction:GetChildren()) do
            v.Adornee = nil
        end
        updateLookVectorText(false)
    end
end

local selectedObjectEvent

local function connectSelectionChanged()
    for i,v in pairs(selection:Get()) do
        if v:IsA("BasePart") or v:IsA("Model") then
            currentlySelected = v
            updateObject()
            selectedObjectEvent = currentlySelected.Changed:Connect(updateObject)
            break
        end
    end
    table.insert(connections, selection.SelectionChanged:Connect(function()
        currentlySelected = nil
        for i,v in pairs(selection:Get()) do
            if v:IsA("BasePart") or v:IsA("Model") then
                currentlySelected = v
                updateObject()
                selectedObjectEvent = currentlySelected.Changed:Connect(updateObject)
                break
            end
        end
        if not currentlySelected then
            if selectedObjectEvent then
                selectedObjectEvent:Disconnect()
                selectedObjectEvent = nil
            end
            updateObject()
        end
    end))
end

local function startPlugin()
    plugin:Activate(true)
    gui.Enabled = true
    binded = true
    runService:BindToRenderStep("FaceSelector by Tukars", Enum.RenderPriority.Last.Value, update)
    table.insert(connections, settings().Studio.ThemeChanged:Connect(updatePluginTheme))
    tweening = true
    connectSelectionChanged()
    for _, ui in pairs(gui.Main.FaceSelector:GetChildren()) do
        if ui ~= gui.Main.FaceSelector.UIListLayout then
            table.insert(connections, ui.MouseButton1Click:Connect(function()
                if gui.Main.FaceSelector:FindFirstChild("selectedFace") then
                    gui.Main.FaceSelector[selectedFace].BackgroundColor3 = getUIColor("RibbonButton", "Default")
                    gui.Main.FaceSelector[selectedFace].TextColor3 = getUIColor("MainText", "Default")
                end
                if ui.Name ~= selectedFace then
                    selectedFace = ui.Name
                    ui.BackgroundColor3 = getUIColor("RibbonButton", "Selected")
                    ui.TextColor3 = getUIColor("MainText", "Selected")
                else
                    selectedFace = nil
                end
                updateObject()
            end))
        end
    end
    table.insert(connections, gui.Main.CheckBoxes.ActiveGui.CheckBox.MouseButton1Click:Connect(function()
        active = not active
        local transparency = active and 0.5 or 1
        gui.Main.CheckBoxes.ActiveGui.CheckBox.Display.Transparency = active and 0 or 1
        for _,ad in pairs(visuals.Face:GetChildren()) do
            ad.Transparency = transparency
        end
        for _,ad in pairs(visuals.Direction:GetChildren()) do
            ad.Transparency = (active and showDirectionalVectors) and 0.5 or 1
        end
    end))
    table.insert(connections, gui.Main.CheckBoxes.ShowVectors.CheckBox.MouseButton1Click:Connect(function()
        showDirectionalVectors = not showDirectionalVectors
        gui.Main.CheckBoxes.ShowVectors.CheckBox.Display.Transparency = showDirectionalVectors and 0 or 1
        local transparency = (showDirectionalVectors and active) and 0.5 or 1
        for _,ad in pairs(visuals.Direction:GetChildren()) do
            ad.Transparency = transparency
        end
        --set all vector to transparency val, if active 1
    end))
    gui.Main:TweenPosition(UDim2.new(0.5, 0, 0, 6), Enum.EasingDirection.In, Enum.EasingStyle.Quad, 0.15, true)
    wait(0.25)
    enabled = true
    tweening = false
end

local function stopPlugin()
    for _,connection in pairs(connections) do
        connection:Disconnect()
    end
    connections = {}
    currentlySelected = nil
    updateObject()
    tweening = true
    gui.Main:TweenPosition(UDim2.new(0.5, 0, 0, -175), Enum.EasingDirection.In, Enum.EasingStyle.Quad, 0.15, true)
    wait(0.25)
    enabled = false
    tweening = false
    if binded then
        runService:UnbindFromRenderStep("FaceSelector by Tukars")
    end
    binded = false
    gui.Enabled = false
    plugin:Deactivate()
end

button.Click:connect(function()
    if not tweening then
        if enabled then
            stopPlugin()
        else
            startPlugin()
        end
    end
end)